399.33—Additional fare flexibility.
For scheduled service in the areas set forth in § 399.32(a), certificated air carriers have the following fare flexibility in addition to that set forth in § 399.32 :
(b) Small aircraft.
Carriers may without restriction set the level of fares for service with aircraft designed to have a maximum passenger capacity of 60 or fewer seats.
(c) Through service and on-line connecting service.
For through service and on-line connecting service, carriers may set their fares up to the sum of the local fares minus one tax-rounded coach ceiling terminal charge for each local fare after the first, if that level is higher than the ceiling set forth in § 399.32(d). The Board will not suspend such a fare on the ground that its level is unreasonable except upon a clear showing of abuse of market power that the Board does not expect to be corrected through marketplace forces.